Plans for a £2bn redevelopment at Euston station will be submitted to parliament next week.
The new plans, unveiled at a briefing yesterday, include the building of 11 new platforms to accommodate High Speed 2 lines.
The redevelopment will also include a number of new public spaces, shops, restaurants and cafes.
Work is expected to begin in 2017 and will initially see six new high-speed platforms and a concourse built to the west of the station.
The first platforms will serve HS2’s phase one line between London and Birmingham and are expected to be completed in 2026.
Five more platforms for phase two’s line from London to Leeds/Manchester will then be built, with an expected completion date of 2033.
The staged approach to building the high-speed terminus will mean existing services will continue to operate from the station during construction.
According to HS2 Ltd, the plans will also offer flexibility so that the station can accommodate further developments of the line and wider regeneration of the area surrounding the station.
Euston development director for HS2 and Network Rail Rupert Walker said: “The plans are proposed for inclusion in the High Speed Rail (London-West Midlands) Bill by means of an additional provision which is due, subject to the approval of parliament, to be deposited on 17 September.”
HS2 Ltd chief executive Simon Kirby said: “These firm proposals will allow Euston to fulfil its potential.
“It’s time for Euston to change. Not just if it is to fulfil its historic role as the gateway between London and much of the rest of the country, but also if it’s to become a much bigger and fully accessible part of its own community.”
Transport secretary Patrick McLoughlin added: “The plans outlined today are essential for the local community, but they also set out a vital piece of infrastructure that will benefit the whole nation – both by improving journeys and also supporting jobs, enabling business growth and bringing our country closer together.
“These are the first steps towards creating a station in Euston of which both the local community and national passengers can be proud.”